Listen carefully in class (most important! Mathematics has nothing to recite, you can understand it in class. When I first entered junior high school, I might not be used to it, and I would be a little passive at first. When I first entered junior high school, I was groggy and couldn't listen, but relying on the foundation of primary school, I passed the monthly exam. After I get used to it, I get full marks in the mid-term exam! Doing homework carefully is also very important, which is equivalent to reviewing. Don't copy homework, and don't underestimate math homework. You won't listen to the exams of teachers and classmates (at least I didn't have any questions when I was a freshman). Be careful. Be careful again. Not speed. I have been careless many times. Sometimes the paper is finished in 20 minutes, and simple questions can make mistakes. Don't cheat in the math exam, so that I can find out that I can't. Look before the exam.

90 is easy, 100 is difficult. It depends on whether you have listened to the teacher's key questions and taken the exam seriously.

Textbooks vary from person to person. If you learn well, buying them is also a waste of money. There are also answers to textbook exercises in the textbook. It depends on how you use them. Personally, I think it is good to know all the middle school textbooks, but it is useless to buy them. As long as the teacher speaks well, you can listen carefully.